#	Chain	Domain ID	Range	Family	Classification
1	A	e4zphA1	A:160-227,A:259-269,A:301-314,A:335-356	PAS	223 → 223.1 → 223.1.1
2	A	e4zphA2	A:98-145	HLH	105 → 105.1 → 105.1.1
3	A	e4zphA3	A:357-464	PAS_11	223 → 223.1 → 223.1.1
4	B	e4zphB1	B:26-70	bHLH_HIF1A	105 → 105.1 → 105.1.1
5	B	e4zphB2	B:71-237	PAS	223 → 223.1 → 223.1.1
6	B	e4zphB3	B:238-361	PAS_11	223 → 223.1 → 223.1.1
7	C	e4zphC1	C:98-145	HLH	105 → 105.1 → 105.1.1
8	C	e4zphC2	C:357-464	PAS_11	223 → 223.1 → 223.1.1
9	C	e4zphC3	C:160-227,C:259-269,C:301-314,C:335-356	PAS	223 → 223.1 → 223.1.1
10	D	e4zphD1	D:25-70	bHLH_HIF1A	105 → 105.1 → 105.1.1
11	D	e4zphD2	D:238-361	PAS_11	223 → 223.1 → 223.1.1
12	D	e4zphD3	D:71-237	PAS	223 → 223.1 → 223.1.1

ECOD domains (colored by index)Unclassified protein regionsNucleic acids (RNA/DNA)Ligands/cofactors